Duplicate messages are received by qmail users : Error Possible_duplicate

Created:

2016-11-16 13:12:02 UTC

Modified:

2017-06-05 06:16:01 UTC

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Duplicate messages are received by qmail users : Error Possible_duplicate

Applicable to:

  • Plesk 12.5 for Linux
  • Plesk 12.0 for Linux

Symptoms

Duplicate messages are received by qmail users. The following errors can be found in the maillog:

root@server log]# less -i maillog.1 | grep "_but_connection_died"
Connected_to_<IP_address_1>_but_connection_died._Possible_duplicate!_timed_out_(#4.4.2)/
Nov 26 17:50:53 pemlinmail01 splogger: 1385484653.371186 delivery 208765: deferral: Connected_to_<IP_address_2>_but_connection_died._(#4.4.2)/
Nov 26 18:09:06 pemlinmail01 splogger: 1385485746.461143 delivery 209075: deferral: Connected_to_<IP_address_3>_but_connection_died._Possible_duplicate!_timed_out_(#4.4.2)/
Nov 26 18:11:33 pemlinmail01 splogger: 1385485893.930699 delivery 209114: deferral: Connected_to_<IP_address_4>_but_connection_died._(#4.4.2)/

Cause

Qmail cannot connect to remote host during the time specified in the /usr/local/qmail/shared/control/timeoutremote file.

Resolution

Increase timeout using command as below:

# echo 180 > /usr/local/qmail/shared/control/timeoutremote
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